It is a bit bothersome to me that this is not yet fixed:
http://secunia.com/internet_explorer_7_popup_address_bar_spoofing_test/
Test your browser to see if you're a potential victim.
This could be used by phishers to pop up windows that look like links are pointing to valid sites when they are not, and trick someone into thinking they are at a bank for instance, instead of some hacker web site.
Not sure why this bug is not considered a top priority.